1.4 T-Jet vs 1.4 and 1.6 16v: which engine is more reliable?
According to our risk index, the 1.4 and 1.6 16v carries less risk than the 1.4 T-Jet: 45/100 versus 48/100 (both moderate risk). The 1.4 T-Jet has 1 documented serious fault, the main one being «Premature turbocharger failure or wear»; the 1.4 and 1.6 16v has 1 documented serious fault, the main one being «Timing belt breakage or premature failure».
The index (0–100) weights the severity and frequency of the three most serious documented faults. How it is calculated
Is the 1.4 T-Jet reliable?
Fiat's 1.4 T-Jet/MultiAir powers a large part of the group's turbo petrol range (Fiat, Abarth, Alfa Romeo, Lancia, Jeep) from 2007 onwards. Several models have accumulated reports of turbocharger failure, MultiAir/UniAir unit faults and high oil consumption; by contrast, there is no documented pattern of timing belt failure.[1][2][3][4][5][6]
See the 4 of the 1.4 T-Jet faultsIs the 1.4 and 1.6 16v reliable?
The K4J (1.4) and K4M (1.6), both naturally aspirated 16-valve units, are simple and generally reliable petrol engines: no source consulted documents oil consumption or faults that destroy the block. Their most-cited weak point is the ignition coils, followed by the crankshaft sensor and, on versions with a variable valve timing unit, its pulley; a neglected belt can cause serious damage, as one case in the Renault Laguna II documents.[7][8][9][10]
See the 6 of the 1.4 and 1.6 16v faultsSide-by-side comparison
| Item | 1.4 T-Jet | 1.4 and 1.6 16v |
|---|---|---|
| Technical data | ||
| Type | Engine | Engine |
| Fuel | Petrol | Petrol |
| Displacement | 1,368 cm³ | — |
| Timing | Timing belt (dry) | Timing belt (dry) |
| Power | 105–205 hp | 75–135 hp |
| Production | 2007–2024[11][12][13][14] | since 1998[15][16][17] |
| Reliability | ||
| Risk index (what is it?) | 48Moderate risk | 45Moderate risk |
| Documented faults | 4 | 6 |
| Of high or critical severity | 1 | 1 |
| Worst severity | High severity | High severity |
| Main faults |
|
|
| Most expensive documented repair | up to €2,300Premature turbocharger failure or wearPublished figure[1][2] | No reliable data |
| Which versions to buy | ||
| BuyRecommended versions | None | |
| With cautionVersions to be cautious about | ||
| AvoidVersions to avoid | None | None |
Severity of each fault: green, low; amber, medium; red, high; dark red, critical. How we rate them
Cars that each one is fitted to
Other comparisons
With the 1.4 T-Jet
- 1.4 T-Jet vs 1.2 PureTech
- 1.4 T-Jet vs 1.0 PureTech
- 1.4 T-Jet vs 1.2 and 1.4 TSI
- 1.4 T-Jet vs 1.0 TSI / 1.5 TSI
- 1.4 T-Jet vs 1.2 TCe
- 1.4 T-Jet vs 1.0 EcoBoost
- 1.4 T-Jet vs 1.3 TCe
- 1.4 T-Jet vs 1.6 EcoBoost
- 1.4 T-Jet vs 2.0 TSI / TFSI
- 1.4 T-Jet vs Audi 3.0 TFSI V6
- 1.4 T-Jet vs BMW B38 / B37
- 1.4 T-Jet vs BMW B48 / B38
- 1.4 T-Jet vs BMW B58
- 1.4 T-Jet vs BMW M54
- 1.4 T-Jet vs BMW N13
- 1.4 T-Jet vs BMW N20
- 1.4 T-Jet vs BMW N43/N46
- 1.4 T-Jet vs BMW N52 / N53
- 1.4 T-Jet vs BMW N54/N55
- 1.4 T-Jet vs BMW N62 / N63
- 1.4 T-Jet vs 1.2 8v Fire
- 1.4 T-Jet vs 1.0 T3 and 1.3 T4 FireFly Turbo
- 1.4 T-Jet vs 0.9 TwinAir and 1.0/1.3 FireFly
- 1.4 T-Jet vs 1.5 EcoBoost
- 1.4 T-Jet vs 1.25/1.4/1.6 Ti-VCT
- 1.4 T-Jet vs 1.2 / 1.4 / 1.8 i-VTEC
- 1.4 T-Jet vs 1.0 / 1.5 VTEC Turbo
- 1.4 T-Jet vs 2.0 / 2.4 i-VTEC
- 1.4 T-Jet vs Honda e:HEV / i-MMD
- 1.4 T-Jet vs Honda IMA híbrido
- 1.4 T-Jet vs 1.0 T-GDI
- 1.4 T-Jet vs 1.6 GDI / T-GDI
- 1.4 T-Jet vs 1.6 GDi híbrido (Kappa)
- 1.4 T-Jet vs 1.0 / 1.25 MPi
- 1.4 T-Jet vs Smartstream 1.6 T-GDi
- 1.4 T-Jet vs 2.0 / 2.4 GDI and T-GDI (Theta II)
- 1.4 T-Jet vs 2.0 and 3.0 Ingenium gasolina
- 1.4 T-Jet vs 2.3 MZR DISI Turbo
- 1.4 T-Jet vs MZR gasolina
- 1.4 T-Jet vs Skyactiv-G
- 1.4 T-Jet vs M111
- 1.4 T-Jet vs M112 / M113
- 1.4 T-Jet vs M264/M254
- 1.4 T-Jet vs M260
- 1.4 T-Jet vs M271
- 1.4 T-Jet vs M272/M273
- 1.4 T-Jet vs M270/M274
- 1.4 T-Jet vs 1.5 VTi-TECH / T-GDI
- 1.4 T-Jet vs MIVEC gasolina
- 1.4 T-Jet vs Mitsubishi PHEV
- 1.4 T-Jet vs 1.6 DIG-T
- 1.4 T-Jet vs 1.5 VC-Turbo e-Power
- 1.4 T-Jet vs 1.2 HR12DE and 1.2 DIG-S (HR12DDR)
- 1.4 T-Jet vs 2.0 MR20DE / 2.5 QR25DE
- 1.4 T-Jet vs 1.6 16v HR16DE / H4M
- 1.4 T-Jet vs 1.0/1.2/1.4 Ecotec
- 1.4 T-Jet vs 1.4 Turbo
- 1.4 T-Jet vs 1.6 and 1.8 Ecotec 16v
- 1.4 T-Jet vs Porsche V8 and V6 (Cayenne and Panamera)
- 1.4 T-Jet vs 1.4 and 1.6 TU3/TU5
- 1.4 T-Jet vs 1.4/1.6 VTi
- 1.4 T-Jet vs 1.6 THP
- 1.4 T-Jet vs 2.0 and 2.2 16v EW10/EW12
- 1.4 T-Jet vs 0.9 TCe
- 1.4 T-Jet vs 1.0 SCe (B4D)
- 1.4 T-Jet vs 1.0 TCe / SCe
- 1.4 T-Jet vs 1.4 and 1.6 8v
- 1.4 T-Jet vs 1.2 16v
- 1.4 T-Jet vs E-Tech Híbrido
- 1.4 T-Jet vs 2.0 16v F4R and F4RT
- 1.4 T-Jet vs Rover K-Series
- 1.4 T-Jet vs 1.0 and 1.4 Boosterjet
- 1.4 T-Jet vs 1.2 Dualjet and 1.2 VVT
- 1.4 T-Jet vs 1.5 K15B (Jimny)
- 1.4 T-Jet vs 1.3, 1.5 and 1.6 gasolina (serie M)
- 1.4 T-Jet vs 1.0 VVT-i
- 1.4 T-Jet vs 1.2 Turbo
- 1.4 T-Jet vs 1.33 Dual VVT-i
- 1.4 T-Jet vs 1.4, 1.6 and 1.8 VVT-i
- 1.4 T-Jet vs 1.5 Hybrid
- 1.4 T-Jet vs 1.6 Dual VVT-i
- 1.4 T-Jet vs 1.8 Hybrid
- 1.4 T-Jet vs 2.0 and 2.4 VVT-i
- 1.4 T-Jet vs 2.0 and 2.5 Hybrid
- 1.4 T-Jet vs Volvo 5 cilindros gasolina
- 1.4 T-Jet vs Drive-E gasolina
- 1.4 T-Jet vs 1.0 MPI
- 1.4 T-Jet vs 1.2 12V
- 1.4 T-Jet vs 1.4 16v and 1.6 MPI/FSI
- 1.4 T-Jet vs 1.8 T 20v
- 1.4 T-Jet vs 2.0 FSI
- 1.4 T-Jet vs VW 2.0 TFSI EA113
With the 1.4 and 1.6 16v
- 1.4 and 1.6 16v vs 1.2 PureTech
- 1.4 and 1.6 16v vs 1.0 PureTech
- 1.4 and 1.6 16v vs 1.2 and 1.4 TSI
- 1.4 and 1.6 16v vs 1.0 TSI / 1.5 TSI
- 1.4 and 1.6 16v vs 1.2 TCe
- 1.4 and 1.6 16v vs 1.0 EcoBoost
- 1.4 and 1.6 16v vs 1.3 TCe
- 1.4 and 1.6 16v vs 1.6 EcoBoost
- 1.4 and 1.6 16v vs 2.0 TSI / TFSI
- 1.4 and 1.6 16v vs Audi 3.0 TFSI V6
- 1.4 and 1.6 16v vs BMW B38 / B37
- 1.4 and 1.6 16v vs BMW B48 / B38
- 1.4 and 1.6 16v vs BMW B58
- 1.4 and 1.6 16v vs BMW M54
- 1.4 and 1.6 16v vs BMW N13
- 1.4 and 1.6 16v vs BMW N20
- 1.4 and 1.6 16v vs BMW N43/N46
- 1.4 and 1.6 16v vs BMW N52 / N53
- 1.4 and 1.6 16v vs BMW N54/N55
- 1.4 and 1.6 16v vs BMW N62 / N63
- 1.4 and 1.6 16v vs 1.2 8v Fire
- 1.4 and 1.6 16v vs 1.0 T3 and 1.3 T4 FireFly Turbo
- 1.4 and 1.6 16v vs 0.9 TwinAir and 1.0/1.3 FireFly
- 1.4 and 1.6 16v vs 1.5 EcoBoost
- 1.4 and 1.6 16v vs 1.25/1.4/1.6 Ti-VCT
- 1.4 and 1.6 16v vs 1.2 / 1.4 / 1.8 i-VTEC
- 1.4 and 1.6 16v vs 1.0 / 1.5 VTEC Turbo
- 1.4 and 1.6 16v vs 2.0 / 2.4 i-VTEC
- 1.4 and 1.6 16v vs Honda e:HEV / i-MMD
- 1.4 and 1.6 16v vs Honda IMA híbrido
- 1.4 and 1.6 16v vs 1.0 T-GDI
- 1.4 and 1.6 16v vs 1.6 GDI / T-GDI
- 1.4 and 1.6 16v vs 1.6 GDi híbrido (Kappa)
- 1.4 and 1.6 16v vs 1.0 / 1.25 MPi
- 1.4 and 1.6 16v vs Smartstream 1.6 T-GDi
- 1.4 and 1.6 16v vs 2.0 / 2.4 GDI and T-GDI (Theta II)
- 1.4 and 1.6 16v vs 2.0 and 3.0 Ingenium gasolina
- 1.4 and 1.6 16v vs 2.3 MZR DISI Turbo
- 1.4 and 1.6 16v vs MZR gasolina
- 1.4 and 1.6 16v vs Skyactiv-G
- 1.4 and 1.6 16v vs M111
- 1.4 and 1.6 16v vs M112 / M113
- 1.4 and 1.6 16v vs M264/M254
- 1.4 and 1.6 16v vs M260
- 1.4 and 1.6 16v vs M271
- 1.4 and 1.6 16v vs M272/M273
- 1.4 and 1.6 16v vs M270/M274
- 1.4 and 1.6 16v vs 1.5 VTi-TECH / T-GDI
- 1.4 and 1.6 16v vs MIVEC gasolina
- 1.4 and 1.6 16v vs Mitsubishi PHEV
- 1.4 and 1.6 16v vs 1.6 DIG-T
- 1.4 and 1.6 16v vs 1.5 VC-Turbo e-Power
- 1.4 and 1.6 16v vs 1.2 HR12DE and 1.2 DIG-S (HR12DDR)
- 1.4 and 1.6 16v vs 2.0 MR20DE / 2.5 QR25DE
- 1.4 and 1.6 16v vs 1.6 16v HR16DE / H4M
- 1.4 and 1.6 16v vs 1.0/1.2/1.4 Ecotec
- 1.4 and 1.6 16v vs 1.4 Turbo
- 1.4 and 1.6 16v vs 1.6 and 1.8 Ecotec 16v
- 1.4 and 1.6 16v vs Porsche V8 and V6 (Cayenne and Panamera)
- 1.4 and 1.6 16v vs 1.4 and 1.6 TU3/TU5
- 1.4 and 1.6 16v vs 1.4/1.6 VTi
- 1.4 and 1.6 16v vs 1.6 THP
- 1.4 and 1.6 16v vs 2.0 and 2.2 16v EW10/EW12
- 1.4 and 1.6 16v vs 0.9 TCe
- 1.4 and 1.6 16v vs 1.0 SCe (B4D)
- 1.4 and 1.6 16v vs 1.0 TCe / SCe
- 1.4 and 1.6 16v vs 1.4 and 1.6 8v
- 1.4 and 1.6 16v vs 1.2 16v
- 1.4 and 1.6 16v vs E-Tech Híbrido
- 1.4 and 1.6 16v vs 2.0 16v F4R and F4RT
- 1.4 and 1.6 16v vs Rover K-Series
- 1.4 and 1.6 16v vs 1.0 and 1.4 Boosterjet
- 1.4 and 1.6 16v vs 1.2 Dualjet and 1.2 VVT
- 1.4 and 1.6 16v vs 1.5 K15B (Jimny)
- 1.4 and 1.6 16v vs 1.3, 1.5 and 1.6 gasolina (serie M)
- 1.4 and 1.6 16v vs 1.0 VVT-i
- 1.4 and 1.6 16v vs 1.2 Turbo
- 1.4 and 1.6 16v vs 1.33 Dual VVT-i
- 1.4 and 1.6 16v vs 1.4, 1.6 and 1.8 VVT-i
- 1.4 and 1.6 16v vs 1.5 Hybrid
- 1.4 and 1.6 16v vs 1.6 Dual VVT-i
- 1.4 and 1.6 16v vs 1.8 Hybrid
- 1.4 and 1.6 16v vs 2.0 and 2.4 VVT-i
- 1.4 and 1.6 16v vs 2.0 and 2.5 Hybrid
- 1.4 and 1.6 16v vs Volvo 5 cilindros gasolina
- 1.4 and 1.6 16v vs Drive-E gasolina
- 1.4 and 1.6 16v vs 1.0 MPI
- 1.4 and 1.6 16v vs 1.2 12V
- 1.4 and 1.6 16v vs 1.4 16v and 1.6 MPI/FSI
- 1.4 and 1.6 16v vs 1.8 T 20v
- 1.4 and 1.6 16v vs 2.0 FSI
- 1.4 and 1.6 16v vs VW 2.0 TFSI EA113
Compare other engines
Sources
Every fact on this page links to its source. If you find an error, let us know.
- Fiat 500X : les plus et les moinsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
- Fiat 500X : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
- Alfa Romeo MiTo : les plus et les moinsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
- Alfa Romeo MiTo : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
- Alfa Romeo Giulietta : les plus et les moinsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
- Fiat Tipo : les plus et les moinsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
- Fiabilité et pannes de la Renault Mégane 1Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
- Fiabilité et pannes du Renault Scénic 1Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
- Fiabilité et pannes de la Renault Laguna 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
- Fiabilité et pannes du Dacia Duster 1Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
- Motor T-JetWikipedia (español) · Other source · consulted 27 September 2026 · in Spanish
- Fiat FIRE engineWikipedia (inglés) · Other source · consulted 27 September 2026
- MultiAirWikipedia (inglés) · Other source · consulted 27 September 2026
- Motor FIREWikipedia (español) · Other source · consulted 27 September 2026 · in Spanish
- Renault K-Type engineWikipedia (inglés) · Other source · consulted 27 September 2026
- Moteur K RenaultWikipedia (francés) · Other source · consulted 27 September 2026 · in French
- Anexo:Motores de RenaultWikipedia (español) · Other source · consulted 27 September 2026 · in Spanish
- Fiabilité et pannes du Dacia Logan 1Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
- Fiat Bravo (2007-2014) : les plus et les moinsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
- Fiat 500 (2007) : les plus et les moinsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
- Jeep Renegade : les plus et les moinsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
- Jeep Compass : les plus et les moinsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
- Fiabilité et pannes de la Renault Clio 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
- Fiabilité et pannes de la Renault Clio 3Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
- Fiabilité et pannes de la Renault Mégane 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
- Fiabilité et pannes du Renault Scénic 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French